Hair iron



FIG. 1 is a front elevational view of a hair iron showing my new design, the cord being broken away for ease of illustration;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof; and

FIG. 5 is a top plan view thereof. 

The ornamental design for a hair iron, substantially as shown and described. 